Pulse width modulation can be used to control a motor by using the duty cycle to ________
A) change effective current delivered to the motor winding
B) change the effective voltage applied to the motor winding
C) changiethe amplitude of the winding current
D) change the amplitued of the winding voltage
A
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Evaluate:
As a result of poor soil, all of the following conditions prevailed in New England EXCEPT that
A. reliance on a single, staple crop became a necessity. B. the area was less ethnically mixed than its southern neighbors. C. frugality became essential to economic survival. D. hard work was required to make a living. E. diversification in agriculture and industry were encouraged.
Which of the following statements is correct?
A) Sand particles have a platelike shape. B) Silt particles have a platelike shape. C) Clay particles have a platelike shape. D) Gravel particles have a platelike shape.
Use Data Sheet 5. The diagonal of a 45 degree horizontal offset is __________ times as long as the offset.
Fill in the blank(s) with the appropriate word(s).